light spectrum

Has anybody anything to support this idea!? https://www.google.co.uk/amp/s/www.growweedeasy.com/slt-selective-light-training-superangryguy%3famp Looks interesting and sounds like it could hold water but can't seem to find anyone implementing it anywhere other than with this guy But from what...

Just a couple of quick questions: 1. Do Autos have to be started under T5/Blue spectrum and changed to HPS later? Or do they go straight under HPS from seed? 2. I have Plant Magic OldTimer grow and bloom. What kind of nutes should be given to autos and when? Appreciate the help and prefer...

What do ya'll know about The company Tasty and there product line of lights? I'm thinking about purchasing one. But with all the bogus claims about their wattage. Its hard to trust what they put on there websites, also ive been looking at bud boss company ( specifically bud boss 151 model) so...

Hey guys i came across this good deal on an LED. Im going in a 2x4x6 closet grow tent. And i need a big LED ficture. i will only be growing about 3 plants. Will this led be strong enough? and can anyone vouche for this type of led light if it is a half decent one? I will be growing autoflowers...

Found this, haven't tried it yet, but could be useful http://m.livescience.com/41548-spectroscopy-science-fair-project.html